Truck-tank loading cap



TRUCK TANK LOADING GAP Filed Dec. 14, 19?

Patented May 14, 1929..

-uNrrEn- STATES PATENT OFFICE.

-oHAnLEs r. H. BoHNHnRD'r, or ngnwoon, cALIronNIA.

i TRUCKFTANK LOADING CAP.

Application filed December 14, 1927. Serial No. 239,975.

bulence and spraying of the stream of in-V 10 coming liquid where the, loading is accomplished by freely discharging the liquid into the tank through a manhole or other opening in the top.A In open filling, the possibility of hllingthe' tank until the fluid runs out of lt the filling opening is always present, with its attendant danger. The obJect of my invcntion is to provide a highly advantageous means for the loading of such liquids and in particular the bjects f my invention are 2@ 1. To do away with open filling of a tank. 5

2. To prevent loss of vapor'during the hlling o f a tank with a volatile li uid.

` 3. To reduce fire hazard when such` liquids as casing head gasoline.

4. To provide av quickly operated means for attaching'the liquid conveying and vapor conveying pipes to the tank to be filled.

1 accomplish these objects with the mechanism illustrated in the accompanying drawinin which igure 1 is a sectional elevation of myy tilling nozzle in position on the tank and ltigure 24 is a sectional elevation of the traveling cap in ositionon the tank.;

Referring to igures 1 and 2, numeral 1 designates any usual or preferred manhole opening in a truck Atank top, wherein a usual or preferred manhole cover 2 isse-V cured, said cover being provided with a central threaded openingr 3. A bushing 4 is adapted to screw into o ening 3 and is provided with a central hu f5, which is carried on four webs so as to leave a clear upward passage between the webs, the outer annular ring@ andthe hub 5. Extending downward from hub 5 and threaded thereto a pipe 7 dependa'itsibottonl end clearing the tank tlcor by about 1 inch. The upper portion et the hole through hub 5 is 'bored .out to a preferred diameter to form the recess 9.. #The top end "of ring 6 is machinedvhat.. Two threaded segmentalV projeetions, carrying an interrupted thread, are formed on the tt dhter surface of the ring '6N These proandling f jections are' diametrically opposed and each segment subtends about 80 of the circum` ference. 'l`he"`bushing 4 becomes a permanent part of the manhole cover 2, or obviously lit could advantageously be screwed cu into the ringed opening formed directly in the 'tank Without the use of the manhole cover.

Referring to Figure 1, the filling nozzle assemblyJ adapted to rest on the top of bushing'4, se-

'cured thereon by a ring nut 12 operating on the aforementioned interrupted thread 6 and on an annularshoulder 13 formed on 70 thebottom of casting. 11. The thread on ring nut-12 is also interrupted, thus permitting yit to be placed over bushin 4 and tightened with an eighth turn. gasket ring 23 of soft 4lead is secured in the annular ring 6 to form a gas tight joint at low pressures. Extending centrally through casting 11v there lis va tube 14 cast integral Awith the casing, this tube extending about 80 its own diameter below the bottom of the bell and for this distance being turned to a sliding' fit in the upperbore 9 of the hub 5. The upper extension of tube 14 through the bell is externally threaded to fit the pipe size 85 desired for lilling the tank `A lateral proj ecting hub 1,5 is provided, internally threadf ed to receivenipple 16 and` conununicating with the space inside the bell and-outside .tube 14;

consists in removing the traveling cap, to be 10c' described later, and securing the filling noz-` zle tothe bushing. 4. The fluid comes to tube 14 and passes down 'through pipe' l dischargin at its open end directly onto the floor o the tank. In this manner prac tically no liquid is volatilized because very little turbulence yis set up and the'liquid is not allowed to fall freely through gas lled space. The vapor in the tank asses u between hub aand ring 6 into bel- 11, an out 11o generallyde'signated by numeral 65 10 is composed of a bell shaped casting 11- endpf 75 casting 11, adapted to seatfon theflat end of into the'vapor line through nipple 16 an Ato contaminate the ground, thus greatly rel ducing the re` hazard. The ring nut 1llustrated is a` preferred andconvenient manner 'of. attaching the filling nozzle 10 to the bushing 4 but with a small decrease in conveniency it gan be readily attached bymeans of the well known swing bolts and swing nuts. e

After the 'tank is loaded the filling nozzle is removed andl the-traveling cap generally' designated by numeral 17 is applied. This cap consists of a casting 18 adapted to fit and to be secured on bushing 4 in the same manner as the filling nozzle. This casting requires but one outlet 19 in which'the vent.

valve 20 is connected.o A pin 21 is provided which passes downward through a hole `drilled in the ring nut 12 and bushing '4- so thatv these holes match when the travelilg cap is clamped in position. If desired an eye can be formed u1n the bottom end of thls pin where it extends through thering nut,

through which the loop of a padlock, not

shownfcan be passed, thus adequately locking the cap in place.- Accidental loss of the gin 21 is prevented .by the chain 22 which exibly secures it to the manhole cover.

A preferred material for the bushing 4, ring-nut 12, and bell V11, is one which is incapable of striking` sparks, such as brass, bronze or aluminum. I

By the use of my improved cap the tank is open to the atmosphere but a few seconds; only during the time required to lift off the travelin vcap and to apply the filling nozzle. ,This time is not sufiicienttdallow an appre ciable'degree of air mixture with vapor or escape of vapor from the tank. If the vapor is infiammable this prevents the formation of explosive mixtures; or ifth'e vapor is retention on the fllling noisome it is not allowed to contaminate the immediate air.

` The utility of my inyention is not limited t'o gasoline-carrying truck tanks as it` can also be advantageously applied to any container used for handling liquids, where difficulties similar'to those incident tothe loading of gasolinefare encountered.

I claim as my invention:

1. A truck tank filling device, comprisino': a. base block adaptedto be -permanent f screwed into said tank; a 1i uid conductor, permanentl attached to said ase block and reaching su stantially to the bottom of said tank; ports through said base block for the passage of vapor; a hollow block bearing nonleakably on said base .block and means for quickly attaching said hollow block to said base block and for quickly detaching .-the same;,`a fiuid inlet connection integral with said hollow block and adapted to cornmunicate solely witli said liquid conductor when said hollow block is attached to said base block, and a vapor outlet integral with said hollow block and adapted to communicate with the interior of said tank through said ports in said base block.

2. A truck tank filling device, comprising:

a liquid conveying means fixed in said tank and extending substantially to the bottom thereof; a unitary adapter for permanent iose and vapor disposal hose and comprising a liquid inlet connection communicating with said liquid conveying means and a vapor outlet connection communicating with the vapor s ace in said tank when said adapter is attaciied to said tank, and means for quickly attaching said adapter to said tank without detaching said adapter from said hose.

In witness that Ix claim the foregoin I have hereunto subscribed my name this th day of December, 1927.

CHARLES F. H. BOHNHARDT; 

